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Body Temperature and How It Effects Weight Loss

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Low core body temperature can potentially affect weight loss in several ways.

Low Body Temperature

Firstly, a low core body temperature may result in a slower metabolic rate, which can make it more difficult to lose weight. The metabolic rate is the rate at which the body burns calories, and a slower metabolic rate means that the body is burning fewer calories throughout the day. This can make it harder to create a calorie deficit, which is necessary for weight loss.

Secondly, low core body temperature can affect the way the body handles insulin, which is a hormone that regulates blood sugar levels. Insulin resistance can lead to weight gain and make it more difficult to lose weight.

Thirdly, a low core body temperature can also lead to decreased energy levels, which can make it more difficult to engage in physical activity. Exercise is an important component of weight loss as it helps to burn calories and build muscle mass.

It is worth noting, however, that while a low core body temperature can potentially impact weight loss, it is not necessarily a significant factor for everyone. There are many other factors that can affect weight loss, including diet, exercise, genetics, and overall health. If you are concerned about your core body temperature and its impact on weight loss, it may be helpful to speak with a healthcare professional or registered dietitian for personalized advice.

In addition to the aforementioned effects, low core body temperature may also result in a decrease in thyroid hormone production. The thyroid gland is responsible for producing hormones that regulate the body's metabolic rate. When the thyroid gland is underactive, or hypothyroidism, the metabolic rate may slow down, making it more difficult to lose weight.

Furthermore, low core body temperature can also affect the body's ability to digest food properly. A decrease in body temperature can slow down the digestive process, which may result in the accumulation of undigested food in the digestive tract. This can lead to bloating, constipation, and other digestive issues that can make weight loss more challenging.

Finally, low core body temperature may also lead to a decrease in muscle mass. When the body is in a state of hypothermia, it may break down muscle tissue to produce heat. This can result in a loss of muscle mass, which can in turn slow down the metabolic rate and make weight loss more difficult.

How High Temperature Can Factor into Weight Loss

The human body temperature is one of the most critical aspects of overall health. It is a sign of the body's internal processes, and any fluctuations can indicate underlying issues. Temperature can be affected by various factors, including diet, exercise, and illness. In this article, we will discuss how high body temperature affects weight.

When we have a fever, the body's internal temperature rises above the normal range of 97.7-99.5°F (36.5-37.5°C). The hypothalamus, a part of the brain that regulates body temperature, raises the body's temperature to help fight off infection. The fever can be a sign that the body is trying to fight off an illness, and it is not a cause of weight gain. However, prolonged fever can lead to dehydration, which can cause temporary weight gain.

When we have a fever, our body's metabolism increases, and we burn more calories than usual. This increase in metabolism can cause weight loss in the short term, as the body is burning more calories than it is taking in. However, this weight loss is usually temporary, and the body's weight returns to normal once the fever subsides.

Moreover, if the body temperature remains consistently elevated, it can have an impact on the body's hormonal balance. High body temperature can increase the production of stress hormones such as cortisol, which can lead to weight gain over time. Cortisol is known to increase appetite and promote fat storage in the abdominal area, leading to an increase in body fat.

Furthermore, high body temperature can lead to an increase in inflammation in the body, which can also lead to weight gain. Chronic inflammation can cause insulin resistance, a condition in which the body cannot use insulin effectively, leading to high blood sugar levels. Insulin resistance is associated with weight gain, particularly in the abdominal area.


In conclusion, while a high body temperature can have a temporary impact on weight, it is not a cause of long-term weight gain. Prolonged fever can cause dehydration, leading to temporary weight gain, but this weight gain is usually reversed once the fever subsides. However, consistent high body temperature can lead to hormonal imbalances and inflammation, which can cause long-term weight gain. It is essential to maintain a healthy body temperature through proper diet, exercise, and lifestyle habits to prevent any adverse effects on weight and overall health.

Howard E. Stanton, MD

Howard Stanton, M.D., is a practicing internist at Brigham and Women’s Hospital in Boston.

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